The 1987 International Comparison of One-OHM Resistance Standards at the BIPM and the Resulting Agreement Among Determination of RH

To evaluate the agreement among determinations of the quantized Hall resistance, RH, in terms of national representations of the ohm, the BIPM organized and conducted an international comparison of one-ohm resistance standards among twelve laboratories. A relative uncertainty of about 2 x 10-8 is expected for some of the resistance comparisons. Resulting values of RH will be presented.